Grinding protection plate



FIG. 1 is a perspective view showing the new design for a grinding protection plate for a welding helmet;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof.

The broken line showing forms no part of the claimed design, and the shading is provided to illustrate contour only and is not an indication of texture, gloss, etc. 

CLAIM The ornamental design for a grinding protection plate, as shown and described. 